# United States

What you need to send to United States on each channel: what is asked for, who files it, how long it takes and what happens if your sender isn't approved.

**Language:** en
**Audience:** platform
**Translation key:** platform.channels.countries.united-states
**Search keywords:** United States registration, send sms to United States, United States requirements, United States rcs, sender United States, United States, US, +1
**Docs index (every page):** https://docs.instasent.com/llms.txt
**This zone's index:** https://docs.instasent.com/platform/en/llms.txt
**This page:** https://docs.instasent.com/platform/en/channels/countries/united-states/ (HTML) · https://docs.instasent.com/platform/en/channels/countries/united-states.md (Markdown)
**Other language (es):** https://docs.instasent.com/platform/es/channels/countries/united-states.md

## What this country needs

### SMS

- **Your sender** — An alphanumeric sender is not accepted on its own here: it has to be registered first.
- Operators here restrict links inside an SMS. If your campaign carries one, check with us before a large send.
- We tell you exactly what is needed while reviewing your registration.
- **Without an approved registration** — Messages still go out and are still billed, but delivery is best-effort: the recipient may see a sender other than yours, and the message can be filtered. You keep seeing your own sender in reports and exports — what changes is what reaches the handset.

### RCS

- **What they ask for** — Authorisation letter
- **Who acts** — You sign the paperwork and return it to us.
- **Have this ready** — The attestation documents the operator asks for in your use case, signed
- **Without an approved registration** — Nothing is sent to this country until the registration is approved.

Depending on the agent's use case, **additional attestation documentation** may be required. When it is, we provide the template and the agent's details; return only what was asked for, filled in and signed.

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This is one page of the Instasent documentation. For the complete machine-readable index of every guide and API reference, fetch https://docs.instasent.com/llms.txt — start there for full context.